Accumulated Other Comprehensive Income - Tax Effects on Each Component of Accumulated Other Comprehensive Income Recognized in Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Foreign currency cumulative translation adjustments, before tax	$ (7.3)	$ (71.0)	$ (26.2)	$ (109.9)
Unrealized cash flow hedge gains, before tax	40.5	64.2	108.3	164.4
Reclassification adjustments on cash flow hedges, before tax	(23.2)	(16.8)	(69.4)	(33.0)
Adjustments to prior service cost and unrecognized actuarial assumptions, before tax	(0.8)	4.7	(3.1)	9.4
Total Other Comprehensive Income (Loss)	9.2	(18.9)	9.6	30.9
Foreign currency cumulative translation adjustments, tax	15.4	24.6	10.5	76.5
Unrealized cash flow hedge gains, tax	6.7	10.3	18.6	31.2
Reclassification adjustments on cash flow hedges, tax	(4.1)	(2.4)	(12.0)	(4.6)
Adjustments to prior service cost and unrecognized actuarial assumptions, tax	(0.1)	1.0	(0.3)	2.2
Total Other Comprehensive Income (Loss), tax	17.9	33.5	16.8	105.3
Foreign currency cumulative translation adjustments, net of tax	(22.7)	(95.6)	(36.7)	(186.4)
Unrealized cash flow hedge gains, net of tax	33.8	53.9	89.7	133.2
Reclassification adjustments on cash flow hedges, net of tax	(19.1)	(14.4)	(57.4)	(28.4)
Adjustments to prior service cost and unrecognized actuarial assumptions, net of tax	(0.7)	3.7	(2.8)	7.2
Total Other Comprehensive Income (Loss)	$ (8.7)	$ (52.4)	$ (7.2)	$ (74.4)